//C05:min_sec.c --transform to minutes and seconds.
#include <stdio.h>
#define SEC_PER_MIN 60
int main(void)
{
    int sec, min, left;
    printf("Convert seconds to minutes and seconds!\n");
    printf("Enter ther number fo seconds (<=0 to quit):\n");
    scanf("%d", &sec);
    while(sec > 0)
    {
        min = sec / SEC_PER_MIN;
        left = sec % SEC_PER_MIN;
        printf("%d seconds is %d minutes, %d seconds,\n", sec, min, left);
        printf("Enter next value(<=0 to quit):\n");
        scanf("%d",&sec);
    }
    printf("Done!\n");
}
